Important witness comes forward in connection with disappearance of Yvon Lacasse

WATCH ABOVE: The search for a missing senior whose vehicle was used in the alleged abduction of a six-year-old boy continued in Lachute on Sunday. As Global’s Phil Carpenter reports, police have now connected with a possible witness who could help lead them to 71-year-old Yvon Lacasse.

An Amber Alert was issued Thursday after the boy vanished from St-Eustache, Que. The boy’s father was apprehended in Ontario nearly 24 hours later, while the boy’s mother was discovered dead inside the family home in a possible homicide.